2x+(x-y)^3 when x=9 and y=7

This problem is from a test review sheet (answer included)I have almost filled a notebook trying to solve this.

2x+(x-y)^3 when x=9 and y=7

2(9) + (9 - 7)^3
18 + (2)^3
18 + 8 = ?

Where were you having a problem?

Got hung up with what to do about the 7 and did not attach the 9 to the left side. Thank you!

You're welcome :)

To solve this problem, you'll need to substitute the given values of x and y into the expression and evaluate it step by step.

Step 1: Start by replacing x with 9 and y with 7 in the given expression:
2(9) + (9 - 7)^3

Step 2: Simplify any expressions within brackets:
2(9) + (2)^3

Step 3: Evaluate the exponentiation:
2(9) + 8

Step 4: Perform the multiplication:
18 + 8

Step 5: Add the two terms:
26

Therefore, when x equals 9 and y equals 7, the expression 2x + (x - y)^3 evaluates to 26.

It's important to keep in mind that solving this problem requires understanding the order of operations (also known as PEMDAS or BODMAS) and substituting the given values into the expression correctly. Practice such problems regularly to become comfortable with the process and improve your problem-solving skills.